问题
解答题
计算比赛
(78+22)×4
=
=
(24+36)×8
=
=
75×2+45
=
=
3×40+56
=
=
4×203+500
=
=
456×4-456
=
=
答案
(78+22)×4
=100×4
=400;
(24+36)×8
=60×8
=480;
75×2+45
=150+45
=195;
3×40+56
=120+56
=176;
4×203+500
=812+500
=1312;
456×4-456
=1824-456
=1368.